diff --git a/lib/customer_repo.rb b/lib/customer_repo.rb
index 940b9b70f6f59df30564a658b73f56bd770e00a3..39820c3db92e9f689b3cbccc32a55f43469e23a5 100644
--- a/lib/customer_repo.rb
+++ b/lib/customer_repo.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "lazy_object"
+require "value_semantics/monkey_patched"
 
 require_relative "customer"
 require_relative "polyfill"
@@ -8,16 +9,11 @@ require_relative "polyfill"
 class CustomerRepo
 	class NotFound < RuntimeError; end
 
-	def initialize(
-		redis: LazyObject.new { REDIS },
-		db: LazyObject.new { DB },
-		braintree: LazyObject.new { BRAINTREE },
-		sgx_repo: TrivialBackendSgxRepo.new
-	)
-		@redis = redis
-		@db = db
-		@braintree = braintree
-		@sgx_repo = sgx_repo
+	value_semantics do
+		redis             Anything(), default: LazyObject.new { REDIS }
+		db                Anything(), default: LazyObject.new { DB }
+		braintree         Anything(), default: LazyObject.new { BRAINTREE }
+		sgx_repo          Anything(), default: TrivialBackendSgxRepo.new
 	end
 
 	def find(customer_id)